Study on Lay Down Welding Process (Report 2)

Bead Formation

Abstract

The followings are the test results of the bead shaping in Lay Down Welding.
1. All of the factors, viz. (1) kind of the covering, (2) the covering composition, (3) the eccentricity ratio of electrode, (4) arc current, (5) groove angle of base metal, and (6) welding position as welding conditions, influence on the bead shaping.
2. As to the relation between 3 factors (the covering composition, the eccentricity ratio of electrode and arc current in welding condition) and good bead area in flat and horizontal fillet welding; By increasing iron powder in the coverings, decreasing the gas materials and enlarging the eccentricity ratio of electrode, the currency for good bead area becomes higher and the extent of current become enlarged. The good bead area in horizontal fillet welding become narrower as compared with the V groove (flat fillet) welding.